Unit Converter
Convert length, weight, temperature, area, volume, speed, time, and data sizes instantly. Supports metric and imperial units. Free, fast, no signup.
How It Works
Using Unit Converter in 3 Steps
Pick a Category
Choose length, weight, temperature, volume, area, speed, time, or data size from the chip row at the top.
Pick From / To Units
Select the units in the From and To dropdowns. Use the swap button to flip the direction in one click.
Type Any Value
Enter a number and the conversion appears live. Copy the result to your clipboard with one click.
Use Cases
Who Uses Unit Converter?
Engineers & Scientists
Convert between SI and imperial units, switch temperature scales, and translate between data-size standards (KB vs KiB) without context-switching to a spreadsheet.
Travellers & Shoppers
Compare metric vs imperial heights, weights, and distances when shopping, packing, or comparing fitness goals.
Cooks & Bakers
Convert between teaspoons, tablespoons, cups, and millilitres for international recipes — accurate to four decimal places.
FAQ
Unit Converter — Frequently Asked Questions
Everything you need to know before you start.
Which unit categories are supported?
Length, weight (mass), temperature, volume, area, speed, time, and digital data sizes (with both decimal KB/MB/GB and binary KiB/MiB/GiB).
Why are KB and KiB shown separately?
KB / MB / GB / TB use base-1000 (decimal), while KiB / MiB / GiB / TiB use base-1024 (binary). Storage manufacturers usually advertise in decimal; operating systems often display in binary. Showing both avoids confusion.
How precise are the conversions?
Conversions use double-precision floating-point math and standard SI/imperial conversion factors. Results show up to 8 significant digits and switch to scientific notation for very small or very large values.
Can I convert temperatures below absolute zero?
The converter does not block it, but physically you can't go below 0 K (-273.15 °C / -459.67 °F). Values below that are still mathematically valid for unit-test cases but have no physical meaning.